51656243325 has 24 divisors (see below), whose sum is σ = 85437948288. Its totient is φ = 27539364480.

The previous prime is 51656243323. The next prime is 51656243363. The reversal of 51656243325 is 52334265615.

It is a happy number.

It is not a de Polignac number, because 51656243325 - 2¹ = 51656243323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656243323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64684 + ... + 327866.

It is an arithmetic number, because the mean of its divisors is an integer number (3559914512).

Almost surely, 2^51656243325 is an apocalyptic number.

It is an amenable number.

51656243325 is a deficient number, since it is larger than the sum of its proper divisors (33781704963).

51656243325 is a wasteful number, since it uses less digits than its factorization.

51656243325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265813 (or 265808 counting only the distinct ones).

The product of its digits is 648000, while the sum is 42.

The spelling of 51656243325 in words is "fifty-one billion, six hundred fifty-six million, two hundred forty-three thousand, three hundred twenty-five".